JP4723538B2 - Engagement chain type lifting device - Google Patents

Description

  The present invention is an elevating device for elevating and lowering an elevating table parallel to an installation surface for use in manufacturing equipment in various manufacturing fields, transport equipment in the transport field, nursing care equipment in the medical and welfare field, stage equipment in the art field, and the like. In particular, the present invention relates to a meshing chain type lifting device that employs a meshing chain as a drive medium for the lifting operation.

2. Description of the Related Art Conventionally, as a lifting device, there is a meshing chain that meshes with each other and moves up and down integrally, that is, a lifting device that lifts and lowers an object to be lifted such as a heavy load using a so-called chuck chain (see Patent Document 1).
Japanese Patent Laid-Open No. 11-278797 (in particular, see page 1 and FIG. 1)

  However, a conventional lifting device using a meshing chain is provided with a meshing chain that moves up and down while supporting the entire load including the object to be lifted and mounted on the mounting table-like load support member on one side of the load support member. Therefore, when the object to be lifted is mounted in a state of being unevenly distributed on the load support member, an uneven load is applied to one side of the load support member, and the mounting surface of the load support member changes from a horizontal state to an inclined state, Various handling measures such as making the load support member into a box shape so that the object to be lifted do not slide down are forced, and handling of the object to be carried in and out of the box load support member becomes difficult. There is a troublesome problem, and the meshing chain that lifts and lowers in a self-supporting state while supporting the entire load including the mounted object to be lifted tends to buckle, and the durability of the meshing chain is impaired. There was a lifting operation on the problem that there is a possibility that produce an unstable vertical movement caused by the shaking.

  Further, in the conventional lifting device using the meshing chain, the drive motor for raising and lowering the meshing chain and the vertical wall-shaped storage guide portion are disposed in the vicinity of the pair of sprockets. The lowering position of the load support member cannot be lowered by the height dimension with respect to the portion, that is, the load support member cannot be lowered, and a heavy work load is imposed on the loading and unloading of the object to be lifted and lowered with respect to the load support member. There was a problem in lifting work.

  Therefore, the technical problem to be solved by the present invention, that is, the object of the present invention is that the object to be lifted / lowered is mounted on the lift table in an unevenly distributed state or in the vicinity of the highest lift position of the lift table. Even if there is a risk of rolling that tends to occur in the width direction, the object to be lifted and lowered mounted on the horizontal mounting surface on the lifting table can be lifted and lowered stably without slipping, and the object to be lifted is included. All the load is reduced on both the left and right sides of the lifting table to reduce buckling of the meshing chain that lifts and lowers in a self-supporting state, realizing excellent chain durability, and lowering the lowest position of the lifting table Thus, it is an object of the present invention to provide a meshing chain lifting device that is safe and simple in carrying out and carrying in and lifting work on the lifting table of the object to be lifted.

  First, the invention according to claim 1 is a pair of lifting and lowering units that are opposed to each other in the same plane and rotate forward and backward in opposite directions around a pair of rotating shafts arranged in parallel to the base plate of the installation surface. The sprocket and the pair of lift sprockets are engaged with each other immediately after being driven to deflect from the horizontal direction to the vertical direction and are lifted together in a self-supporting state, and at the time of the deflection drive from the vertical direction to the horizontal direction by the pair of lift sprockets. A pair of elevating drive meshing chains that are disengaged from each other and branched, an elevating table that is fixed to the upper end of the elevating drive meshing chain and that moves up and down integrally, and is extendable between the elevating table and the installation surface side A lifting assist guide means provided to guide the lifting operation of the lifting table, and a pair of lifting sprockets installed on the base plate to transmit power to the rotating shaft A meshing chain type lifting device including a transmission gear group for driving a gear and a drive motor for transmitting power to the transmission gear group, wherein the lifting driving meshing chain includes a hook-shaped inner tooth plate and the hook-shaped inner teeth. A hook-shaped outer tooth plate that is shifted by a half pitch in the longitudinal direction of the chain with respect to the plate, a bush that connects and fixes the hook-shaped inner tooth plates in the chain width direction, a roller that is externally fitted to the bush, and the hook-shaped outer 2 knitted in double rows in the chain width direction using connection pins connected and fixed to the tooth plate in the chain width direction, and sandwiching the transmission gear group at spaced positions on the left and right sides of the lower part of the lifting table. A position in which the lifting assist guide means is further separated from the lifting drive engagement chains on the lower left and right sides of the lifting table. By being arranged, it is obtained by solving the above problems.

  The invention according to claim 2 is the mesh chain type lifting apparatus according to claim 1, wherein the drive motor is spaced apart in the peripheral area of the lowest lowered position of the lifting table, thereby further solving the problem. It has been solved.

  Further, the invention according to claim 3 is the meshing chain type lifting device according to claim 1 or 2, wherein the meshing chain storage means for branching and storing the pair of lifting drive meshing chains in the horizontal direction is the above. The problem is further solved by being spaced apart in the peripheral area of the lowest lowered position of the lifting table.

  The mesh chain type lifting device of the present invention is a pair of lifting sprockets that are opposed to each other in the same plane and rotate forward and backward in opposite directions around a pair of rotating shafts arranged parallel to the base plate of the installation surface. And a pair of elevating sprockets that mesh with each other immediately after being driven to deflect from the horizontal direction to the vertical direction. A pair of lifting drive meshing chains that come off and branch, a lifting table that is fixed to the upper ends of these lifting drive meshing chains and that moves up and down integrally, and is provided between the lifting table and the installation surface side so as to be stretchable. A lifting assist guide means for guiding the lifting operation of the lifting table and a pair of lifting sprockets installed on the base plate to transmit power to the rotating shaft. By having a transmission gear group that drives the bracket and a drive motor that transmits power to the transmission gear group, the elevating table can be raised and lowered according to the forward and reverse rotation of the elevating sprocket regardless of the elevating position. The lifting / lowering operation of the lifting / lowering table can be achieved at a constant speed and quickly, and a high degree of design freedom can be realized for the chain storage means and the drive part. In addition, the following special effects can be achieved. it can.

  That is, in the meshing chain type lifting device according to the first aspect of the present invention, two pairs of lifting drive meshing chains are arranged so as to sandwich the transmission gear group at spaced positions on the left and right sides of the lower part of the lifting table. Even if the object to be lifted is mounted on the lifting table in an unevenly distributed manner, or even if there is a risk of rolling that tends to occur in the width direction of the lifting table near the highest position of the lifting table, the lifting table A pair of elevating drive meshing chains spaced apart so as to sandwich the transmission gear group on both the left and right sides of the lower part of the elevating part of the elevating table. Since the object is moved up and down in a state, the object to be moved can be moved up and down stably on the horizontal mounting surface.

  Then, the lifting drive meshing chain is overlapped with the hook-shaped inner tooth plate and the hook-shaped inner tooth plate which are overlapped with each other by shifting the hook-shaped inner tooth plate by a half pitch in the longitudinal direction of the chain. By knitting in double rows in the chain width direction using a bush that is connected and fixed in the direction, a roller that is externally fitted to the bush, and a connection pin that is connected and fixed in the chain width direction to the hook-shaped external tooth plate, A hook-shaped external tooth plate and a hook-shaped internal tooth plate that constitute one of the pair of lifting drive mesh chains, and a hook-shaped external tooth plate and a hook-shaped internal tooth plate that constitute the other lift drive mesh chain that opposes this. Mounted to mate with multiple hooks, so-called chucks, in multiple rows in the chain width direction. The chain width of the lifting / lowering interlocking chain even when an eccentric load is applied to one side in the chain width direction of the lifting / lowering interlocking chain that lifts and lowers in a self-supporting state while supporting the entire load including the lifted object Excellent chain durability can be achieved by reliably suppressing buckling that tends to occur in the direction.

Further, since the lifting assist guide means is provided so as to be extendable and retractable between the lifting table and the installation surface side, an uneven load does not act on the lifting assist guide means. The lifting operation of the lifting table can be smoothly guided.
In addition, since the lifting assist guide means is disposed at a position further separated from the lifting drive meshing chains on the lower left and right sides of the lifting table, the lifting table is moved up and down following the lifting drive of the lifting drive meshing chain. Since the operation is guided without any difficulty in guiding, it is possible to ensure the stability of the lifting table that moves up and down.

  In addition, in the mesh chain type lifting device according to claim 2, in addition to the effect exhibited by the mesh chain type lifting device according to claim 1, the drive motor is spaced apart from the peripheral area of the lowest position of the lifting table. Therefore, the lowering position of the lifting table can be lowered without considering the height dimension of the drive motor, that is, the floor of the lifting table can be lowered. The burden of carrying out and carrying in can be greatly reduced, and the drive motor does not become a cause of work obstruction during the maintenance of the lifting mechanism, and safe and simple maintenance work can be achieved.

  According to a third aspect of the present invention, in addition to the effect of the first and second interlocking chain lifting devices according to the first and second aspects, the pair of lifting and lowering driving chain chains are horizontally branched and stored. Since the meshing chain storage means is spaced apart in the peripheral area of the lowest position of the lifting table, it is possible to lift and lower without considering the height of the storage space due to the lifting of the lifting chain meshing chain as in the prior art. Lowering the lowest position of the table, that is, lowering the lifting table, can greatly reduce the work load of loading and unloading objects to and from the lifting table, and the lifting drive meshing chain. Maintenance can be easily achieved.

  The present invention relates to a pair of lifting sprockets that are opposed to each other in the same plane and rotate forward and backward in opposite directions around a pair of rotating shafts arranged parallel to the base plate of the installation surface, and a pair of these lifting and lowering sprockets. A pair of gears that are engaged with each other immediately after being driven to deflect from the horizontal direction to the vertical direction by the sprocket for lifting and lifted in a self-supporting state, and that are separated from each other by a pair of lifting sprockets and driven to be deflected from the vertical direction to the horizontal direction. Elevating drive meshing chains, elevating tables fixed to the upper ends of these elevating driving meshing chains and moving up and down integrally, and elevating operations of the elevating tables provided between the elevating tables and the installation surface side so as to be extendable and retractable A lifting assist guide means for guiding the gear and a shift gear installed on the base plate for transmitting power to the rotating shaft and driving a pair of lifting sprockets In a meshing chain type lifting device having a group and a drive motor for transmitting power to the transmission gear group, the lifting drive meshing chain is in the longitudinal direction of the chain with respect to the hook-shaped inner tooth plate and the hook-shaped inner tooth plate. A hook-shaped external tooth plate and a hook-shaped internal tooth plate, which are overlapped with each other by a half pitch, are connected and fixed in the chain width direction to a bush that is connected and fixed in the chain width direction, a roller fitted on the bush, and a hook-shaped external tooth plate. And two pairs are arranged so as to sandwich the transmission gear group at spaced apart positions on the left and right sides of the lower part of the lifting table. It is arranged at a position further away from the lifting drive meshing chains on both the left and right sides of the table. Mounted on the horizontal mounting surface of the lifting table even when there is a risk of rolling that tends to occur in the width direction of the lifting table near the highest position of the lifting table. Stablely lifts and lowers the lifted object without sliding down, and reduces the total load including the lifted object on both the left and right sides of the lifting table and suppresses buckling of the meshing chain that lifts and lowers in an independent state. If the lowering position of the lifting table is lowered and the work to carry in and out of the lifting table and the maintenance work are safe and simple, the specific embodiment is as follows. Anything can be used.

  For example, the lifting / lowering engagement chain that is spaced apart from the right and left sides of the lifting / lowering table in the lifting / lowering device of the present invention is a so-called chuck chain. Immediately after being driven to be deflected to each other, they are lifted together in a self-supporting state, and they are separated from each other by a pair of elevating sprockets from the vertical direction to the horizontal direction when they are driven to be deflected. The chain form may be either one having rollers in two or more rows in the chain width direction or one having bushes.

  Furthermore, in the meshing chain type lifting device of the present invention, the lifting table that lifts and lowers the object to be lifted is lifted and lowered by the driving force of the lifting drive meshing chain. In order to guide the stable lifting operation of this lifting table It is desirable to interpose a lifting assist guide means between the lifting table and the installation surface side. A specific form of the lifting assist guide means is an X-shaped pantar arm used for a scissor lifter or the like. Alternatively, a telescopic pipe used for a guide post lifter or the like may be used.

An embodiment of the present invention will be described with reference to FIGS.
Here, FIG. 1 is an overall perspective view of the meshing chain type lifting device according to the first embodiment of the present invention, and FIG. 2 is a perspective view of the state in which the lifting table and the panta arm are removed from FIG. FIG. 3 is a partially enlarged view of the vicinity of the lift drive sprocket shown in FIG. 2, and FIG. 4 is a view showing an exploded assembly state and a disengagement state of the lift drive engagement chain used in this embodiment. FIG. 5 is a front view showing the highest rising position of the meshing chain type lifting apparatus according to the present embodiment, and FIG. 6 is a side view showing the highest lifting position of the meshing chain type lifting apparatus according to the present embodiment. 7 is an overall perspective view showing the lowest lowered position of the meshing chain type lifting device according to the present embodiment, and FIG. 8 is a front view showing the lowest lowered position of the meshing chain type lifting device according to the present embodiment. Yes, FIG. 9 shows the meshing chain type lifting device of this embodiment. It is a side view showing a lowered position, FIG. 10 is an overall perspective view of the engagement chain type elevator apparatus according to a second embodiment of the present invention.

  First, as shown in FIG. 1, the meshing chain type lifting device 100 according to the first embodiment of the present invention lifts and lowers a lifting table 110 on which a heavy object (not shown) is mounted in parallel to the installation surface. It is intended for installation.

  As shown in FIGS. 1 to 4, the meshing chain type lifting device 100 of the present embodiment is parallel to the base plate 120 installed on the installation surface on which the lifting table 110 is lifted and lowered in parallel. A pair of elevating sprockets 140, 140 that are opposed to each other in the same plane and rotate in the opposite direction in the opposite direction around a pair of rotating shafts 130, 130 arranged in parallel, and a pair of these elevating sprockets 140, 140 A pair of lifting drive engagement chains 150 and 150 that lift and lower the lifting table 110 by being disengaged with each other, and the lifting table 110 that is fixed to the upper ends of the lifting drive engagement chains 150 and 150 and moves up and down integrally, A drive motor 160 that drives a pair of lifting sprockets 140, 140 and a basic device configuration Te are provided.

  Reference numerals 161 and 161 shown in FIGS. 1 and 2 are a pair of drive side sprockets arranged coaxially on the output shaft side of the drive motor 160, and reference numerals 162 and 162 are a pair of lifts from the drive side sprockets 161 and 161. 3 is a pair of power transmission chains composed of roller chains for transmitting power to the sprockets 140 and 140 side. Reference numerals 163 and 163 shown in FIG. 3 shift the rotation in one direction from the pair of power transmission chains 162 and 162. A transmission gear group for transmitting power to the pair of elevating sprockets 140 and 140 so as to rotate forward and backward in opposite directions.

  In the meshing chain type lifting device 100 of the present embodiment, as shown in FIG. 3, a chain guide for guiding and moving a pair of lifting drive meshing chains 150 and 150 that are disengaged from the pair of lifting sprockets 140 and 140. A plate 170 is provided in a crotch region where the pair of lifting sprockets are opposed to each other, and the pair of lifting drive engagement chains 150 and 150 are engaged with each other immediately after being driven to deflect from the horizontal direction to the vertical direction, and are integrally raised in a self-supporting state. It is like that.

  Further, as shown in FIG. 1 and the like, the drive motor 160 described above is spaced apart from the area around the lowest position of the lift table 110, that is, outside the area under the projection umbrella of the lift table 110.

Further, as shown in FIG. 1, the above-described chain storage means 180 is also spaced apart from the peripheral area of the lowest position of the lifting table 110, that is, outside the area under the projection umbrella of the lifting table 110, as with the drive motor 160. ing.
That is, one of the pair of lifting drive meshing chains 150 and 150 that are separated from each other and branched is housed in a chain housing means 180 including a take-up type chain housing box 181 disposed on the drive motor 160 side. The other of the pair of lifting drive engagement chains 150, 150 is configured to be stored in a chain storage means 180 including a linear storage rail 182 disposed on the opposite side facing the drive motor 160.

  Therefore, it is possible to lower the lowest position of the lift table 110, that is, to lower the floor of the lift table 110 without considering the height dimension of the drive motor 160 and the meshing chain storage means 180. Thus, the work burden of carrying the object to and from the lifting table 110 is greatly reduced, and the drive motor 160 and the meshing chain storage means 180 are safe and simple during maintenance of the lifting mechanism. Maintenance work can be performed.

Further, as shown in FIG. 1, a vertical auxiliary guide means of an upper and lower two-stage connection comprising an inner arm 191 and an outer arm 192 called an X-shaped panter arm between the lifting table 110 and the base plate 120 on the installation surface side. By interposing 190, it is configured to guide a stable lifting operation of the lifting table 110.
Reference numeral 193 shown in FIG. 1 and the like is a slide rail for sliding the lower end of the inner arm 191 in accordance with the raising / lowering operation.

  Therefore, the pair of lifting drive engagement chains 150 and 150, which is the most characteristic feature of the engagement chain type lifting apparatus 100 according to the first embodiment of the present invention, is a so-called chuck chain, as shown in FIG. The hook-shaped internal tooth plate 151, the hook-shaped external tooth plate 152 that overlaps the hook-shaped internal tooth plate 151 with a half-pitch shift in the longitudinal direction of the chain, and the hook-shaped internal tooth plates 151 are connected in the chain width direction. Are knitted in two rows in the chain width direction using the bushes 153 that are connected and fixed to each other, the rollers 154 that are externally fitted to the bushes 153, and the connection pins 155 that are connected and fixed to each other in the chain width direction. Are engaged with each other immediately after the above-described chain guide plate 170 is driven to deflect from the horizontal direction to the vertical direction. Together they are arranged to branch off bite each other during deflection drive the horizontal direction from the vertical direction by a pair of lifting sprockets 140, 140 as well as increased in self-supporting integral.

  A hook-shaped inner tooth plate 151 and a hook-shaped outer tooth plate 152 constituting one of the pair of lifting drive meshing chains 150 and 150 are hooked to constitute the other lifting drive meshing chain 150 facing the other. The inner tooth plate 151 and the hook-like outer tooth plate 152 are engaged with each other in multiple hooks, so-called chuck shapes, in multiple rows in the chain width direction, so that they are engaged with each other. Even when an eccentric load is applied to one side in the chain width direction on the lifting / lowering engagement chain 150, 150 that moves up and down in a self-supporting state while supporting all loads including objects, the lifting / lowering engagement chain is in an overloaded state. The buckling that tends to occur in the chain width direction of 150 is reliably suppressed.

Further, in the meshing chain type lifting device 100 according to the first embodiment of the present invention, the pair of lifting drive meshing chains 150 and 150 described above are disposed at positions spaced apart from each other on the left and right sides of the lowering table 110, that is, Two pairs of lifting drive engagement chains 150, 150 are arranged so as to sandwich the transmission gear group 163, so that the object to be lifted is mounted on the lifting table 110 in an unevenly distributed manner or the lifting table 110. Even when there is a risk of rolling that tends to occur in the width direction of the lifting table 110 in the vicinity of the most raised position, a pair of lifting drive engagement chains 150 that are spaced apart on the left and right sides of the lifting table 110, Two sets of elevating drive meshing chains, one set of 150, carry the entire load including the object to be lifted on both the left and right sides of the elevating table. It is raised and lowered in bisected to in a self-supporting state with reduced by sharing the load.
The above-described lifting assist guide means 190 is provided so as to be freely extendable between the lifting table 110 and the installation surface side, and the lifting drive meshing chains 150, 150 are provided so that an offset load does not act on the lifting assist guide means 190. The raising / lowering operation of the raising / lowering table 110 is smoothly guided according to the raising / lowering drive.
In addition, the above-described lifting assist guide unit 190 is disposed at a position further separated from the lifting drive engagement chains 150 and 150 on both the left and right sides of the lowering table 110, so that the lifting drive engagement chains 150 and 150. Following up and down driving, the up and down operation of the up and down table 110 is guided with easy guidance and guidance to ensure the stability of the up and down table 110 that goes up and down.

Next, the raising / lowering operation of the meshing chain type lifting / lowering apparatus 100 according to the first embodiment of the present invention will be described with reference to FIGS. 1 and 5 to 9.
First, as shown in FIGS. 1 and 5 to 6, when the lifting table 110 reaches the highest position, the pair of lifting drive mesh chains 150, 150 is connected to the chain storage box by the pair of lifting sprockets 140, 140. The lifting / lowering table 110 is mounted on a lifting / lowering object (not shown) made of a heavy object. It rises at a constant speed and quickly according to the output of the drive motor 160 while supporting the entire weight.
It should be noted that at this time, the vertical auxiliary guide means 190 of the upper and lower two-stage connection form composed of the inner arm 191 and outer arm 192 called the X-shaped panter arm described above guides the stable lifting operation of the lifting table 110. It has become.

On the other hand, as shown in FIGS. 7 to 9, when the lifting table 110 reaches the lowest position, the pair of lifting drive mesh chains 150, 150 are linearly connected to the chain storage box 181 by the pair of lifting sprockets 140, 140. The pair of lifting drive engagement chains 150 and 150 are pulled while being branched into the chain storage means 180 composed of the shape storage rails 182 and driven while supporting the entire weight of the lifting table 110 on which heavy objects (not shown) are mounted. According to the output of the motor 160, it descends at a constant speed and quickly.
At this time, the upper / lower two-stage connected lifting / lowering guide means 190 composed of the X-shaped inner arm 191 and outer arm 192 guides the stable lowering operation of the lifting / lowering table 110 while being folded. ing.

  As described above, the meshing chain type lifting device 100 according to the first embodiment of the present invention includes a pair of lifting drive meshing chains 150 and 150 that are spaced apart on the left and right sides of the lifting table 110, respectively. Since the entire load including the lifting object is lifted up and down in a self-supporting state divided into two on both the left and right sides of the lifting table 110, the lifted object can be lifted and lowered stably on the horizontal mounting surface, and a pair of lifting drive engagements A hook-shaped internal tooth plate 151 and a hook-shaped external tooth plate 152 that constitute one of the chains 150 and 150 are connected to the hook-shaped internal tooth plate 151 and the hook-shaped external Since the teeth plate 152 and the tooth plate 152 are engaged in multiple hooks, so-called chucks, in multiple rows in the chain width direction, Even when an unbalanced load is applied to one side of the bull 110, it is possible to realize excellent chain durability by reliably suppressing buckling, which tends to occur in the chain width direction of the lifting / lowering driving engagement chain 150, and X Since an uneven load does not act on the lifting / lowering auxiliary guide means 190 composed of a letter-shaped inner arm 191 and outer arm 192 in the upper and lower two-stage connection form, the lifting / lowering assistance guide means 190 that follows the lifting / lowering driving engagement chains 150 and 150. The smooth extension guide function can be demonstrated.

  In addition, the meshing chain type lifting apparatus 100 according to the first embodiment of the present invention can realize a high degree of design freedom of the drive portion including the chain storage means 180 and the drive motor 160, and the drive motor 160 and the chain storage means. Without considering the height dimension of 180, the lowest position of the lifting table 110 can be lowered, that is, the floor of the lifting table 110 can be lowered. The work load to be carried in can be greatly reduced, and the drive motor 160 and the chain storage means 180 can be achieved without causing any trouble during maintenance of the lifting mechanism. is there.

Next, FIG. 8 shows a meshing chain type lifting apparatus 200 that is a second embodiment of the present invention.
The meshing chain lift device 200 according to the second embodiment of the present invention has the same basic configuration as the meshing chain lift device 100 according to the first embodiment of the present invention described above. The description is omitted by rewriting the attached 100th series to the 200th series.
Accordingly, since the meshing chain type lifting device 200 according to the second embodiment of the present invention is different from the meshing chain type lifting device 100 according to the first embodiment of the present invention described above, only the lifting assist guide means 290 is different. Only the lifting assist guide means 290 will be described below.

In other words, the meshing chain type lifting device 200 of this embodiment is a lifting assist guide means 290 composed of telescopic pipes that are successively reduced in diameter upward at four locations between the lifting table 210 and the base plate 220 on the installation surface side. By interposing it, it is comprised so that the stable raising / lowering operation | movement of the raising / lowering table 210 may be guided.
In short, the above-described lifting assist guide means 290 is provided between the lifting table 210 and the installation surface so as to be extendable and retractable, and the lifting drive meshing chains 250 and 250 are prevented from acting on the lifting assist guide means 290. The lifting / lowering operation of the lifting / lowering table 210 is smoothly guided in accordance with the lifting / lowering driving.
In addition, the above-described lifting assist guide means 290 is disposed at a position further separated from the lifting drive engagement chains 250, 250 on the lower left and right sides of the lifting table 210, so that the lifting drive engagement chains 250, 250 Following up and down driving, the raising and lowering operation of the raising and lowering table 210 is guided with easy guidance and guidance, and the stability of the raising and lowering table 210 that goes up and down is ensured.

  The meshing chain type lifting device 200 according to the second embodiment of the present invention obtained as described above is also a pair of lifting chain meshing chains 250 in the same manner as the meshing chain type lifting device 100 according to the first embodiment described above. , 250 are arranged at spaced apart positions on the left and right sides of the lower part of the lifting table 210, that is, two pairs of lifting drive engagement chains 250, 250 are arranged so as to sandwich the transmission gear group 263. Since the entire load including the lifted object is lifted up and down in a self-supporting state divided into two on the left and right sides of the lift table 210, the lifted object can be lifted and lowered stably on a horizontal mounting surface, and a pair of lifts A hook-shaped inner tooth plate 251 and a hook-shaped outer tooth plate 252 that constitute one of the drive meshing chains 250 and 250 are the other lifting drive facing this. Since the hook-shaped inner tooth plate 251 and the hook-shaped outer tooth plate 252 constituting the meshing chain 250 are engaged in multiple hooks, so-called chucks, in multiple rows in the chain width direction, they are raised and lowered. Even when an unbalanced load is applied to one side of the table 210, it is possible to reliably suppress buckling, which tends to occur in the chain width direction of the lifting drive engagement chain 250, and to realize excellent chain durability.

  Further, the meshing chain type lifting device 200 according to the second embodiment of the present invention is also separated from the drive motor 260 and the meshing chain storage means 280 in the vicinity of the lowest position of the lifting table 210 as in the first embodiment. By being arranged, the lifting table 210 can be lowered without considering the height dimension of the drive motor 260 and the meshing chain storage means 280. The work load of loading and unloading can be greatly reduced, and the drive motor 260 and the meshing chain storage means 280 are not a cause of trouble during maintenance of the lifting mechanism, so that safe and simple maintenance work can be achieved. It is enormous.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall perspective view of a meshing chain lifting device that is a first embodiment of the present invention. The perspective view of the state which removed the raising / lowering table and the panta arm from FIG. FIG. 3 is a partially enlarged view of the vicinity of a lifting drive sprocket shown in FIG. 2. The figure which showed the assembly / disassembly state of the meshing chain for raising / lowering drive, and the disengagement state. The front view which shows the highest raise position of the meshing chain type raising / lowering apparatus which is a present Example. The side view which shows the highest raising position of the meshing chain type raising / lowering apparatus which is a present Example. The whole perspective view which shows the lowest position of the meshing chain type raising / lowering apparatus which is a present Example. The front view which shows the lowest fall position of the meshing chain type raising / lowering apparatus which is a present Example. The side view which shows the lowest fall position of the meshing chain type raising / lowering apparatus which is a present Example. The whole perspective view of the meshing chain type raising / lowering apparatus which is 2nd Example of this invention.

100, 200 ... meshing chain type lifting device 110, 210 ... lifting table 120, 220 ... base plate 130 ... rotary shaft 140, 240 ... lifting sprocket 150, 250 ... for lifting drive Engagement chain 151 ・ ・ ・ Hook-like internal tooth plate 152 ・ ・ ・ Hook-like external tooth plate 153 ・ ・ ・ Bush 154 ・ ・ ・ Roller 155 ・ ・ ・ Connection pin 160, 260 ・ ・ ・ Drive motor 161 ・ ・ ・ Drive side Sprocket 162 ... power transmission chain 163 ... transmission gear group 170 ... chain guide plate 180, 280 ... chain storage means 181 ... take-up type chain storage box 182 ... linear storage rail 190, 290 ... Elevating assist guide means 191 ... Inner arm 192 ... outer arm 193 ... slide rail

Claims (3)

A pair of lifting sprockets that face each other in the same plane and rotate forward and backward in opposite directions around a pair of rotating shafts arranged parallel to the base plate of the installation surface, and the pair of lifting sprockets horizontally Immediately after the deflection drive from the vertical direction to the vertical direction, a pair of lift drives that mesh with each other and rise in a self-supporting state, and are separated from each other and branched by the pair of lift sprockets during the deflection drive from the vertical direction to the horizontal direction. And a lifting / lowering table fixed to the upper end of the lifting / lowering driving meshing chain. The lifting / lowering table is provided between the lifting / lowering table and the installation surface so as to be extendable / contracted to guide the lifting / lowering operation of the lifting / lowering table. An ascending / descending auxiliary guide means, a transmission gear group installed on the base plate and transmitting power to the rotating shaft to drive a pair of elevating sprockets; In engagement chain type lifting device and a drive motor for power transmission to the speed gear group,
The elevating drive meshing chain is overlapped with the hook-shaped inner tooth plate and the hook-shaped inner tooth plate which are overlapped with the hook-shaped inner tooth plate shifted by a half pitch in the chain longitudinal direction. Are knitted in double rows in the chain width direction using the bushes connected to and fixed to the bushes, rollers fitted on the bushes, and connecting pins fixed and connected to the hook-shaped external teeth plate in the chain width direction. Two sets are arranged so as to sandwich the transmission gear group at spaced positions on both the left and right sides of the lowering table,
The meshing chain type lifting device, wherein the lifting assist guide means is disposed at a position further separated from the lifting drive meshing chains on the lower left and right sides of the lifting table.   The meshing chain type lifting device according to claim 1, wherein the drive motor is spaced apart from a peripheral region of the lowest position of the lifting table. The engagement chain storage means for branching and storing the pair of lifting drive engagement chains in the horizontal direction is spaced apart in the peripheral region of the lowest position of the lift table. The mesh chain type lifting device according to 2.

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